_utmb Google Analytics Cookie Demystified

In this post I will explain _utmb  cookie, one of the many cookie Google Analytics uses.  This cookie is used to track the customer variable that you set in your code.  _utmb is a session cookie and is removed at the end of the session.

_utmb cookie consists of four parts separated by “.”

1. A hash key that identifies the domain and is unique for each domain

2. Page Views in that session

3. An identifier to store count of outbound links that have not been tracked yet.  I am still doing more research on it.  You will generally see 10 as the value for this part of the cookie.

4.Timestamp of last time the cookie was set

The final cookie looks like this

[domain identifier].[page views in that session].[outbound link].[timestamp]

Related:

  1. _utma Google Analytics Cookie Demystified
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  3. _utmv Google Analytics Cookie Demystified

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